Fix some crashes

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.kt

@@ -176,13 +176,15 @@ class DownloadService : Service() {
      * Listens to downloader status. Enables or disables the wake lock depending on the status.
      */
     private fun listenDownloaderState() {
-        subscriptions += downloadManager.runningRelay.subscribe { running ->
-            if (running) {
-                wakeLock.acquireIfNeeded()
-            } else {
-                wakeLock.releaseIfNeeded()
+        subscriptions += downloadManager.runningRelay
+            .doOnError { /* Swallow wakelock error */ }
+            .subscribe { running ->
+                if (running) {
+                    wakeLock.acquireIfNeeded()
+                } else {
+                    wakeLock.releaseIfNeeded()
+                }
             }
-        }
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.network.interceptor
 
 import android.annotation.SuppressLint
 import android.content.Context
+import android.os.Build
 import android.webkit.WebSettings
 import android.webkit.WebView
 import android.widget.Toast
@@ -10,6 +11,7 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.util.lang.launchUI
+import eu.kanade.tachiyomi.util.system.DeviceUtil
 import eu.kanade.tachiyomi.util.system.WebViewClientCompat
 import eu.kanade.tachiyomi.util.system.WebViewUtil
 import eu.kanade.tachiyomi.util.system.isOutdated
@@ -37,13 +39,14 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
      * Application class.
      */
     private val initWebView by lazy {
-        try {
-            WebSettings.getDefaultUserAgent(context)
-        } catch (_: Exception) {
-            // Crashes on some devices. We just ignore it since the only impact is slower
-            // WebView init in those rare cases.
-            // See https://bugs.chromium.org/p/chromium/issues/detail?id=1279562
+        // Crashes on some devices. We skip this in some cases since the only impact is slower
+        // WebView init in those rare cases.
+        // See https://bugs.chromium.org/p/chromium/issues/detail?id=1279562
+        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.S && DeviceUtil.isSamsung) {
+            return@lazy
         }
+
+        WebSettings.getDefaultUserAgent(context)
     }
 
     @Synchronized

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -159,14 +159,16 @@ class ReaderActivity : BaseRxActivity<ReaderActivityBinding, ReaderPresenter>()
         applyAppTheme(preferences)
 
         // Setup shared element transitions
-        window.requestFeature(Window.FEATURE_ACTIVITY_TRANSITIONS)
-        findViewById<View>(android.R.id.content).transitionName = SHARED_ELEMENT_NAME
-        setEnterSharedElementCallback(MaterialContainerTransformSharedElementCallback())
-        window.sharedElementEnterTransition = buildContainerTransform(true)
-        window.sharedElementReturnTransition = buildContainerTransform(false)
+        findViewById<View>(android.R.id.content)?.let { contentView ->
+            window.requestFeature(Window.FEATURE_ACTIVITY_TRANSITIONS)
+            contentView.transitionName = SHARED_ELEMENT_NAME
+            setEnterSharedElementCallback(MaterialContainerTransformSharedElementCallback())
+            window.sharedElementEnterTransition = buildContainerTransform(true)
+            window.sharedElementReturnTransition = buildContainerTransform(false)
 
-        // Postpone custom transition until manga ready
-        postponeEnterTransition()
+            // Postpone custom transition until manga ready
+            postponeEnterTransition()
+        }
 
         super.onCreate(savedInstanceState)
 

app/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.util.system
 
 import android.annotation.SuppressLint
+import android.os.Build
 import logcat.LogPriority
 
 object DeviceUtil {
@@ -25,6 +26,10 @@ object DeviceUtil {
         }
     }
 
+    val isSamsung by lazy {
+        Build.MANUFACTURER.equals("samsung", ignoreCase = true)
+    }
+
     @SuppressLint("PrivateApi")
     private fun getSystemProperty(key: String?): String? {
         return try {

app/src/main/java/eu/kanade/tachiyomi/widget/preference/ThemesPreference.kt

@@ -47,6 +47,10 @@ class ThemesPreference @JvmOverloads constructor(context: Context, attrs: Attrib
     }
 
     override fun onItemClick(position: Int) {
+        if (position !in 0..entries.size) {
+            return
+        }
+
         callChangeListener(value)
         value = entries[position].name
     }